/*************************************************************************
 *                                                                       *
 * Vega FEM Simulation Library Version 3.1                               *
 *                                                                       *
 * "Large Modal Deformation Factory",                                    *
 * a pre-processing utility for model reduction of                       *
 * deformable objects undergoing large deformations.                     *
 *                                                                       *
 *  Copyright (C) 2007 CMU, 2009 MIT, 2016 USC                           *
 *                                                                       *
 * All rights reserved.                                                  *
 *                                                                       *
 * Code author: Jernej Barbic                                            *
 * http://www.jernejbarbic.com/code                                      *
 *                                                                       *
 * Research: Jernej Barbic, Fun Shing Sin, Daniel Schroeder,             *
 *           Doug L. James, Jovan Popovic                                *
 *                                                                       *
 * Funding: National Science Foundation, Link Foundation,                *
 *          Singapore-MIT GAMBIT Game Lab,                               *
 *          Zumberge Research and Innovation Fund at USC                 *
 *                                                                       *
 * This utility is free software; you can redistribute it and/or         *
 * modify it under the terms of the BSD-style license that is            *
 * included with this library in the file LICENSE.txt                    *
 *                                                                       *
 * This utility is distributed in the hope that it will be useful,       *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the file     *
 * LICENSE.TXT for more details.                                         *
 *                                                                       *
 *************************************************************************/

// create the configuration files for a runtime simulation

#include "StVKReducedInternalForces.h"
#include "StVKReducedStiffnessMatrix.h"
#include "matrixIO.h"
#include "matrix.h"
#include "generateMassMatrix.h"
#include "largeModalDeformationFactory.h"

using namespace std;

static const char * folder_open_xpm_2[] = {
/* columns rows colors chars-per-pixel */
"16 15 31 1",
"6 c #9BACC2",
"w c #547B99",
"5 c #94A5BD",
". c #376485",
"; c #F1F4F7",
"o c #7F99B4",
"2 c #D1D9E5",
"- c #EAEDF3",
"O c #718BA7",
"0 c #65839D",
"* c #DCE2EA",
": c #F5F6F7",
"7 c #597B9A",
"X c #8DA0B9",
"  c None",
"+ c #467291",
"q c #305F81",
"& c #D6DFE7",
"3 c #6A89A2",
"1 c #A8B6CA",
"= c #E4E9ED",
"> c #F8F9FA",
", c #FDFDFE",
"9 c #215579",
"8 c #7F97B0",
"@ c #B3BFD1",
"< c #7A90AC",
"$ c #C2CBDB",
"4 c #A2B3C5",
"% c #CAD6E1",
"# c #BBC4D6",
/* pixels */
"                ",
".....           ",
".XXXo.          ",
".XXXXO........  ",
".XXXXXXXXXXXX.  ",
".XXXXXXXXXXXX.  ",
".X++++++++++++++",
".X+@#$%&*=-;:>,+",
".<.1@#$%2*=-;:23",
"..X41@#$%2*=-;3 ",
"..X561@#$%2*=-3 ",
".78X561@#$%2*%3 ",
"90<8X561@#$%23  ",
"q++++++++++++w  ",
"                "
};


const char lightingString[] = 
"*globalAmbientIntensity\n"
"0.2\n"
"\n"
"*enableSpecularTerm\n"
"false\n"
"\n"
"#### light 3\n"
"\n"
"*lightEnabled_3\n"
"true\n"
"\n"
"*position_3_X\n"
"-30\n"
"*position_3_Y\n"
"30\n"
"*position_3_Z\n"
"-30\n"
"\n"
"*lightIntensity_3\n"
"0.5\n"
"\n"
"#### light 6\n"
"\n"
"*lightEnabled_6\n"
"true\n"
"\n"
"*position_6_X\n"
"30\n"
"*position_6_Y\n"
"30\n"
"*position_6_Z\n"
"30\n"
"\n"
"*lightIntensity_6\n"
"0.5\n";

int MyFrame::PreprocessSingleSimulation(wxString & projectName, int numLinearModes, int numNonLinearModes, int numComputationThreads)
{
  // === compute linear modes

  int oldNumLinearModes = uiState.numComputedLinearModes;
  uiState.numComputedLinearModes = numLinearModes;

  double * newFrequencies = NULL;
  double * newLinearModes = NULL;
  int newr;

  SetCursor(*wxHOURGLASS_CURSOR);
  LinearModesWorker(
    uiState.numComputedLinearModes,
    &newr, &newFrequencies, &newLinearModes );
  SetCursor(*wxSTANDARD_CURSOR);

  if (newr != uiState.numComputedLinearModes)
  {
    uiState.numComputedLinearModes = oldNumLinearModes;
    this->errMsg( _T("Linear mode computation failed"),
           _T("Linear mode computation failed.") );
    free(newFrequencies);
    free(newLinearModes);
    return 1;
  }
  else
  {
    precomputationState.linearModesAvailable = true;
    uiState.firstModalComputation = false;
    UpdateMenus();

    delete(precomputationState.linearModalMatrix);
    precomputationState.rLin = uiState.numComputedLinearModes;
    precomputationState.linearModalMatrix = new ModalMatrix(
      precomputationState.simulationMesh->getNumVertices(),
      precomputationState.rLin, newLinearModes);
    free(newLinearModes);

    free(precomputationState.frequencies);
    precomputationState.frequencies = newFrequencies;
    precomputationState.frequenciesAvailable = true;

    precomputationState.linearModesAvailable = true;
    uiState.eraseRangeHi = precomputationState.rLin;

    // set the rigid modes based on the number of constrained vertices
    if (precomputationState.fixedVertices.size() >= 3)
    {
      precomputationState.numRigidModes = 0;
    }
    else if (precomputationState.fixedVertices.size() == 2)
    {
      precomputationState.numRigidModes = 1;
    }
    else if (precomputationState.fixedVertices.size() == 1)
    {
      precomputationState.numRigidModes = 3;
    }
    else
    {
      precomputationState.numRigidModes = 6;
    }

    //uiState.numComputedNonLinearModes = 2 * (precomputationState.rLin - precomputationState.numRigidModes);

    modeSelectionControl->SetValue(1);

    SelectView(UIState::VIEW_LINEAR_MODES);
    SetAutoRenderingMagnitude(precomputationState.linearModalMatrix);

    UpdateMenus();

    myGLCanvas->UpdateLinearModesRenderData();

    Refresh();
  }

  // === compute modal derivatives

  double * modalDerivatives = NULL;
  int code;
  SetCursor(*wxHOURGLASS_CURSOR);
  ComputeModalDerivatives(&code, &modalDerivatives);
  SetCursor(*wxSTANDARD_CURSOR);

  if (code != 0)
  {
    this->errMsg( _T("Modal derivatives computation failed"),
           _T("Modal derivatives computation failed.") );
    free(modalDerivatives);
    return 2;
  }
  else
  {
    printf("Modal derivative computation succeeded.\n"); fflush(NULL);

    precomputationState.modalDerivativesAvailable = true;

    delete(precomputationState.modalDerivativesMatrix);
    precomputationState.modalDerivativesMatrix = new ModalMatrix(
        precomputationState.simulationMesh->getNumVertices(),
        (precomputationState.rLin - precomputationState.numRigidModes) * (precomputationState.rLin - precomputationState.numRigidModes + 1) / 2,
        modalDerivatives);
    free(modalDerivatives);

    UpdateMenus();
  }

  // === compute nonlinear modes 

  int oldNumNonLinearModes = uiState.numComputedNonLinearModes;
  uiState.numComputedNonLinearModes = numNonLinearModes;

  double * newNonLinearModes = NULL;

  int dataOrigin = 0; // linear modes and modal derivatives

  SetCursor(*wxHOURGLASS_CURSOR);
  NonLinearModesWorker(&code, dataOrigin,
    uiState.numComputedNonLinearModes,
    &newNonLinearModes );
  SetCursor(*wxSTANDARD_CURSOR);

  if (code != 0)
  {
    char s[96];
    if (code < 0)
      sprintf(s, "Nonlinear mode computation failed. Memory allocation error.");
    else
      sprintf(s, "Nonlinear mode computation failed. dgesvd exit code: %d\n", code);
    this->errMsg( _T("Nonlinear mode computation failed"),  wxString(s, wxConvUTF8));
    free(newNonLinearModes);
    uiState.numComputedNonLinearModes = oldNumNonLinearModes;
    return 3;
  }
  else
  {
    precomputationState.nonLinearModesAvailable = true;
    UpdateMenus();

    delete(precomputationState.nonLinearModalMatrix);
    precomputationState.rNonLin = uiState.numComputedNonLinearModes;
    precomputationState.nonLinearModalMatrix = new ModalMatrix(
      precomputationState.simulationMesh->getNumVertices(),
      precomputationState.rNonLin, newNonLinearModes);
    free(newNonLinearModes);

    modeSelectionControl->SetValue(1);

    SelectView(UIState::VIEW_NONLINEAR_MODES);
    SetAutoRenderingMagnitude(precomputationState.nonLinearModalMatrix);

    UpdateMenus();

    myGLCanvas->UpdateNonLinearModesRenderData();

    Refresh();
  }

  // === compute cubic polynomials

  uiState.numComputationThreads = numComputationThreads;

  StVKReducedInternalForces * newCubicPolynomials = NULL;

  SetCursor(*wxHOURGLASS_CURSOR);
  CubicPolynomialsWorker(&code, &newCubicPolynomials);
  SetCursor(*wxSTANDARD_CURSOR);

  if (code != 0)
  {
    this->errMsg( _T("Cubic polynomials computation failed"),
           _T("Cubic polynomials computation failed.") );
    free(newCubicPolynomials);
    return 4;
  }
  else
  {
    delete(precomputationState.cubicPolynomials);
    precomputationState.cubicPolynomials = newCubicPolynomials;
    precomputationState.cubicPolynomialsAvailable = true;

    UpdateMenus();

    Refresh();
  }

  // === save the resulting nonlinear modes and cub files
  if (uiState.enableBatchOutput)
  {
    // save nonlinear modes
    wxString nonLinearModesFilename = projectName + _T(".U");
    const char * nonLinearModesFilenameC = (const char*)nonLinearModesFilename.mb_str();
    int code = WriteMatrixToDisk((char*)nonLinearModesFilenameC,
      3 * precomputationState.nonLinearModalMatrix->Getn(),
      precomputationState.nonLinearModalMatrix->Getr(),
      precomputationState.nonLinearModalMatrix->GetMatrix());
    code = code + 1;

    // save cubic polynomials
    wxString cubicPolynomialsFilename = projectName + _T(".cub");
    const char * cubicPolynomialsFilenameC = (const char*)cubicPolynomialsFilename.mb_str();
    code = precomputationState.cubicPolynomials->Save((char*)cubicPolynomialsFilenameC);
  }

  return 0;
}

void MyFrame::OnBatchPreprocessSingleSimulation(wxCommandEvent & event)
{
  // === create the dialog

  wxDialog * dlg = new wxDialog(this, -1, _T("Batch pre-process single model"),
    wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE, _T("dialogBox") );

  wxBoxSizer * dlgSizer = new wxBoxSizer(wxVERTICAL);

  // === num linear modes control

  // set suggested number of linear modes
  char numLinearModesStringC[256];
  int numSuggestedModes = uiState.numComputedLinearModes;
  if (uiState.firstModalComputation)
  {
    // increase the number of suggested modes based on the number of constrained vertices
    if (precomputationState.fixedVertices.size() == 2)
    {
      numSuggestedModes += 1;
    }
    else if (precomputationState.fixedVertices.size() == 1)
    {
      numSuggestedModes += 3;
    }
    else if (precomputationState.fixedVertices.size() == 0)
    {
      numSuggestedModes += 6;
    }
  }
  sprintf(numLinearModesStringC, "%d", numSuggestedModes);

  wxStaticText * numLinearModesText = new wxStaticText(dlg, -1,
       _T("Number of linear modes: "), wxDefaultPosition, wxDefaultSize,
       wxALIGN_CENTER, _T( "staticText"));

  wxTextCtrl * numLinearModesControl = new wxTextCtrl(dlg, -1,
      wxString(numLinearModesStringC, wxConvUTF8), wxDefaultPosition, wxSize(100,-1));

  wxBoxSizer * numLinearModesSizer = new wxBoxSizer(wxHORIZONTAL);
  numLinearModesSizer->Add(numLinearModesText, 0, wxCENTER);
  numLinearModesSizer->Add(numLinearModesControl, 0, wxCENTER);
  dlgSizer->Add(numLinearModesSizer, 0, wxALL | wxALIGN_LEFT, 4);

  // === num nonlinear modes control

  // set suggested number of nonlinear modes
  char numNonLinearModesStringC[256];
  sprintf(numNonLinearModesStringC, "%d", uiState.numComputedNonLinearModes);

  wxStaticText * numNonLinearModesText = new wxStaticText(dlg, -1,
       _T("Size of simulation basis: "), wxDefaultPosition, wxDefaultSize,
       wxALIGN_CENTER, _T( "staticText"));

  wxTextCtrl * numNonLinearModesControl = new wxTextCtrl(dlg, -1,
      wxString(numNonLinearModesStringC, wxConvUTF8), wxDefaultPosition, wxSize(100,-1));

  wxBoxSizer * numNonLinearModesSizer = new wxBoxSizer(wxHORIZONTAL);
  numNonLinearModesSizer->Add(numNonLinearModesText, 0, wxCENTER);
  numNonLinearModesSizer->Add(numNonLinearModesControl, 0, wxCENTER);
  dlgSizer->Add(numNonLinearModesSizer, 0, wxALL | wxALIGN_LEFT, 4);

  // === num computation threads control

  // set the number of computation threads
  char numComputationThreadsC[96];
  sprintf(numComputationThreadsC, "%d", uiState.numComputationThreads);

  wxStaticText * numComputationThreadsText = new wxStaticText(dlg, -1,
       _T("Number of computation threads: "), wxDefaultPosition, wxDefaultSize,
       wxALIGN_CENTER, _T( "staticText"));

  wxTextCtrl * numComputationThreadsControl = new wxTextCtrl(dlg, -1,
      wxString(numComputationThreadsC, wxConvUTF8), wxDefaultPosition, wxSize(100,-1));

  wxBoxSizer * numComputationThreadsSizer = new wxBoxSizer(wxHORIZONTAL);
  numComputationThreadsSizer->Add(numComputationThreadsText, 0, wxCENTER);
  numComputationThreadsSizer->Add(numComputationThreadsControl, 0, wxCENTER);
  dlgSizer->Add(numComputationThreadsSizer, 0, wxALL | wxALIGN_LEFT, 4);

  // === output project name control

  wxCheckBox * enableBatchOutput = new wxCheckBox(dlg, -1, _T("Output modal matrix and polynomials to disk files"));
  enableBatchOutput->SetValue(uiState.enableBatchOutput);
  dlgSizer->Add(enableBatchOutput, 0, wxALL | wxALIGN_LEFT, 4);

  wxStaticText * projectNameText = new wxStaticText(dlg, -1,
       _T("Output prefix: "), wxDefaultPosition, wxDefaultSize,
       wxALIGN_CENTER, _T( "staticText"));

  wxTextCtrl * projectNameControl = new wxTextCtrl(dlg, -1, uiState.currentWorkingDirectory + _T("/") + uiState.projectName, wxDefaultPosition, wxSize(400, -1));

  wxBoxSizer * projectNameSizer = new wxBoxSizer(wxHORIZONTAL);
  projectNameSizer->Add(projectNameText, 0, wxALIGN_CENTER);
  projectNameSizer->Add(projectNameControl, 0, wxEXPAND | wxCENTER);
  dlgSizer->Add(projectNameSizer, 0, wxLEFT | wxRIGHT | wxEXPAND | wxALIGN_LEFT, 4);

  dlgSizer->Add(dlg->CreateButtonSizer(wxOK | wxCANCEL), 0, wxALL | wxALIGN_CENTER, 8);

  dlg->SetSizer(dlgSizer);
  dlgSizer->SetSizeHints(dlg);

  if (dlg->ShowModal() != wxID_OK)
  {
    delete(dlg);
    return;
  }

  uiState.enableBatchOutput = enableBatchOutput->GetValue();
  wxString numLinearModes_valueString = numLinearModesControl->GetValue();
  wxString numNonLinearModes_valueString = numNonLinearModesControl->GetValue();
  wxString numComputationThreads_valueString = numComputationThreadsControl->GetValue();
  wxString projectName = projectNameControl->GetValue();

  delete(dlg);

  // check if user input is legal

  bool goodInput = true;

  long numLinearModes_value;
  goodInput = goodInput & numLinearModes_valueString.ToLong(&numLinearModes_value);
  long numNonLinearModes_value;
  goodInput = goodInput & numNonLinearModes_valueString.ToLong(&numNonLinearModes_value);
  long numComputationThreads_value;
  goodInput = goodInput & numComputationThreads_valueString.ToLong(&numComputationThreads_value);

  if (goodInput)
  {
    if ((numLinearModes_value <= 0) || (numLinearModes_value > 16384))
      goodInput = false;

    if ((numNonLinearModes_value <= 0) || (numNonLinearModes_value > 16384))
      goodInput = false;

    if ((numComputationThreads_value <= 0) || (numComputationThreads_value > 65536))
      goodInput = false;
  }

  if (goodInput)
  {
    int code = PreprocessSingleSimulation(projectName, numLinearModes_value, numNonLinearModes_value, numComputationThreads_value);
    if (code != 0)
      printf("Error: preprocess failed, exit code %d.\n", code);
  }
  else
  {
    this->errMsg( _T("Invalid input"),  _T("Invalid input") );
  }
}

void MyFrame::PreprocessManySimulationsDeallocateHelper(int numModels, char ** meshFiles, char ** bouFiles, int * numLinearModes, int * numNonLinearModes)
{
  free(numNonLinearModes);
  free(numLinearModes);
  for(int i=0; i<numModels; i++)
  {
    free(meshFiles[i]);
    free(bouFiles[i]);
  }

  free(meshFiles);
  free(bouFiles);
}

class PreprocessManySimulationsDialog : public wxDialog
{
public:
  PreprocessManySimulationsDialog(wxWindow * parent, MyFrame * myFrame);

  wxString GetScriptFilename() { return scriptFilenameTextCtrl->GetValue(); }
  bool GetNumComputationThreads(long * numComputationThreads) { return numComputationThreadsTextCtrl->GetValue().ToLong(numComputationThreads); } 

protected:
  MyFrame * myFrame;

  wxBoxSizer * dlgSizer;

  wxStaticText * scriptFilenameText;
  wxTextCtrl * scriptFilenameTextCtrl;
  wxBitmapButton * scriptFilenameButton;
  wxBoxSizer * scriptFilenameTextSizer;

  wxStaticText * numComputationThreadsText;
  wxTextCtrl * numComputationThreadsTextCtrl;
  wxBoxSizer * numComputationThreadsSizer;

  void OnScriptFilenameButton(wxCommandEvent& event);

  DECLARE_EVENT_TABLE()
};

BEGIN_EVENT_TABLE(PreprocessManySimulationsDialog, wxDialog)
    EVT_BUTTON(ID_ScriptFilenameButton, PreprocessManySimulationsDialog::OnScriptFilenameButton)
END_EVENT_TABLE()

PreprocessManySimulationsDialog::PreprocessManySimulationsDialog(wxWindow * parent, MyFrame * myFrame_):
  wxDialog(parent, -1, _T(""), wxDefaultPosition, wxDefaultSize), myFrame(myFrame_)
{
  wxString title = _T("Batch pre-process many models");
  SetTitle(title);

  dlgSizer = new wxBoxSizer(wxVERTICAL);

  // === script filename control

  scriptFilenameText = new wxStaticText(this, -1,
       _T("Input script: "), wxDefaultPosition, wxDefaultSize,
       wxALIGN_CENTER, _T( "staticText"));

  wxString defaultScriptFilename = myFrame->uiState.manySimulationsscriptFilename;
  if (defaultScriptFilename == _T("none"))
    defaultScriptFilename = myFrame->uiState.currentWorkingDirectory + _T("/");

  scriptFilenameTextCtrl = new wxTextCtrl(this, -1, defaultScriptFilename, wxDefaultPosition, wxSize(400, -1));

  wxImage openFileImage(folder_open_xpm_2);
  scriptFilenameButton = new wxBitmapButton(
    this, ID_ScriptFilenameButton, wxBitmap(openFileImage));

  scriptFilenameTextSizer = new wxBoxSizer(wxHORIZONTAL);
  scriptFilenameTextSizer->Add(scriptFilenameText, 0, wxALIGN_CENTER);
  scriptFilenameTextSizer->Add(scriptFilenameTextCtrl, 0, wxEXPAND | wxCENTER);
  scriptFilenameTextSizer->Add(scriptFilenameButton, 0, wxCENTER);
  dlgSizer->Add(scriptFilenameTextSizer, 0, wxLEFT | wxRIGHT | wxEXPAND | wxALIGN_LEFT, 4);

  // === num computation threads control

  char numComputationThreadsC[96];
  sprintf(numComputationThreadsC, "%d", myFrame->uiState.numComputationThreads);

  numComputationThreadsText = new wxStaticText(this, -1,
       _T("Number of computation threads: "), wxDefaultPosition, wxDefaultSize,
       wxALIGN_CENTER, _T( "staticText"));

  numComputationThreadsTextCtrl = new wxTextCtrl(this, -1,
      wxString(numComputationThreadsC, wxConvUTF8), wxDefaultPosition, wxSize(100,-1));

  numComputationThreadsSizer = new wxBoxSizer(wxHORIZONTAL);
  numComputationThreadsSizer->Add(numComputationThreadsText, 0, wxCENTER);
  numComputationThreadsSizer->Add(numComputationThreadsTextCtrl, 0, wxCENTER);
  dlgSizer->Add(numComputationThreadsSizer, 0, wxALL | wxALIGN_LEFT, 4);

  wxSizer * buttonSizer = CreateButtonSizer(wxOK | wxCANCEL);
  dlgSizer->Add(buttonSizer, 0, wxLEFT | wxRIGHT | wxBOTTOM | wxCENTER, 8);

  SetSizer(dlgSizer);
  dlgSizer->SetSizeHints(this);
}


void PreprocessManySimulationsDialog::OnScriptFilenameButton(wxCommandEvent& event)
{
  wxString title = _T("Select script filename");
  wxString fileTypes = _T("All files(*)|*");

  wxFileDialog *dlg = new wxFileDialog(this, title, myFrame->uiState.currentWorkingDirectory,
                _T(""), fileTypes,
                wxFD_OPEN /*| wxHIDE_READONLY*/, wxDefaultPosition);

  if ( dlg->ShowModal() == wxID_OK )
  {
    wxString filename(dlg->GetPath());
    myFrame->SaveCurrentWorkingDirectory(filename);
    if( !filename.empty() )
      scriptFilenameTextCtrl->SetValue(filename);
  }
}

void MyFrame::OnBatchPreprocessManySimulations(wxCommandEvent & event)
{
/*
  // === create the dialog

  wxDialog * dlg = new wxDialog(this, -1, _T("Batch pre-process many models"),
    wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE, _T("dialogBox") );

  wxBoxSizer * dlgSizer = new wxBoxSizer(wxVERTICAL);

  // === script filename control

  wxStaticText * scriptFilenameText = new wxStaticText(dlg, -1,
       _T("Input script: "), wxDefaultPosition, wxDefaultSize,
       wxALIGN_CENTER, _T( "staticText"));

  wxTextCtrl * scriptFilenameControl = new wxTextCtrl(dlg, -1, uiState.currentWorkingDirectory + _T("/"), wxDefaultPosition, wxSize(400, -1));

  wxImage openFileImage(folder_open_xpm_2);
  wxBitmapButton * scriptFilenameButton = new wxBitmapButton(
    this, ID_ScriptFilenameButton, wxBitmap(openFileImage));

  wxBoxSizer * projectNameSizer = new wxBoxSizer(wxHORIZONTAL);
  projectNameSizer->Add(scriptFilenameText, 0, wxALIGN_CENTER);
  projectNameSizer->Add(scriptFilenameControl, 0, wxEXPAND | wxCENTER);
  projectNameSizer->Add(scriptFilenameButton, 0, wxCENTER);
  dlgSizer->Add(projectNameSizer, 0, wxLEFT | wxRIGHT | wxEXPAND | wxALIGN_LEFT, 4);

  // === num computation threads control

  char numComputationThreadsC[96];
  sprintf(numComputationThreadsC, "%d", uiState.numComputationThreads);

  wxStaticText * numComputationThreadsText = new wxStaticText(dlg, -1,
       _T("Number of computation threads: "), wxDefaultPosition, wxDefaultSize,
       wxALIGN_CENTER, _T( "staticText"));

  wxTextCtrl * numComputationThreadsControl = new wxTextCtrl(dlg, -1,
      wxString(numComputationThreadsC, wxConvUTF8), wxDefaultPosition, wxSize(100,-1));

  wxBoxSizer * numComputationThreadsSizer = new wxBoxSizer(wxHORIZONTAL);
  numComputationThreadsSizer->Add(numComputationThreadsText, 0, wxCENTER);
  numComputationThreadsSizer->Add(numComputationThreadsControl, 0, wxCENTER);
  dlgSizer->Add(numComputationThreadsSizer, 0, wxALL | wxALIGN_LEFT, 4);

  // === OK, CANCEL buttons

  dlgSizer->Add(dlg->CreateButtonSizer(wxOK | wxCANCEL), 0, wxALL | wxALIGN_CENTER, 8);

  dlg->SetSizer(dlgSizer);
  dlgSizer->SetSizeHints(dlg);

  if (dlg->ShowModal() != wxID_OK)
  {
    delete(dlg);
    return;
  }

  wxString numComputationThreads_valueString = numComputationThreadsControl->GetValue();
  wxString scriptFilename = scriptFilenameControl->GetValue();

  delete(dlg);

  long numComputationThreads_value;
  bool goodInput = numComputationThreads_valueString.ToLong(&numComputationThreads_value);
*/

  PreprocessManySimulationsDialog * dlg = new PreprocessManySimulationsDialog(this, this);
  
  if (dlg->ShowModal() != wxID_OK)
  {
    delete(dlg);
    return;
  }

  printf("Here...\n"); fflush(NULL);

  long numComputationThreads_value;
  bool goodInput = dlg->GetNumComputationThreads(&numComputationThreads_value);
  wxString scriptFilename = dlg->GetScriptFilename();
  delete(dlg);

  // check if user input is legal
  if (!goodInput)
  {
    this->errMsg( _T("Incorrect number of threads."), _T("Incorrect number of threads."));
    return;
  }

  uiState.numComputationThreads = numComputationThreads_value;
  uiState.manySimulationsscriptFilename = scriptFilename;

  printf("Num computation threads: %ld\n", numComputationThreads_value); fflush(NULL);
  printf("Opening script file %s...\n", (const char*) scriptFilename.mb_str()); fflush(NULL);

  FILE * fin = fopen((const char*)scriptFilename.mb_str(), "r");
  if (!fin)
  {
    this->errMsg( _T("Could not open the script file."), _T("Could not open the script file."));
    return;
  }

  // read the number of models
  int numModels;
  if ((fscanf(fin, "%d\n", &numModels) < 0) || (numModels <= 0))
  {
    this->errMsg( _T("Incorrect number of models in the script file."), _T("Incorrect number of models in the script file."));
    fclose(fin);
    return;
  }

  printf("Detected %d models.\n", numModels);

  // read directory name
  char directoryName[4096];
  if (fgets(directoryName, 4096, fin) == NULL)
  {
    this->errMsg( _T("Incorrect directory name in the script file."), _T("Incorrect directory name in the script file."));
    fclose(fin);
    return;
  }

  if (directoryName[strlen(directoryName)-1] == '\n')
    directoryName[strlen(directoryName)-1] = 0;

  printf("Directory name is %s .\n", directoryName);

  char ** meshFiles = (char**) malloc (sizeof(char*) * numModels);
  char ** bouFiles = (char**) malloc (sizeof(char*) * numModels);
  for(int i=0; i<numModels; i++)
  {
    meshFiles[i] = (char*) malloc (sizeof(char) * 256);
    bouFiles[i] = (char*) malloc (sizeof(char) * 256);
  }
  int * numLinearModes = (int*) malloc (sizeof(int) * numModels);
  int * numNonLinearModes = (int*) malloc (sizeof(int) * numModels);
  
  for(int i=0; i<numModels; i++)
  {
    if (fscanf(fin, "%s %s %d %d\n", meshFiles[i], bouFiles[i], &numLinearModes[i], &numNonLinearModes[i]) != 4)
    {
      wxString errM = _T("Incorrect line in the script file, model #");
      char numStr[128] = "";
      sprintf(numStr,"%i .",i);
      errM += wxString(numStr, wxConvUTF8);
      this->errMsg(errM, errM);
      fclose(fin);
      PreprocessManySimulationsDeallocateHelper(numModels, meshFiles, bouFiles, numLinearModes, numNonLinearModes);
      return;
    }
    else
    {
      printf("Model #%d: %s %s %d %d\n", i, meshFiles[i], bouFiles[i], numLinearModes[i], numNonLinearModes[i]);
    }
  }
  fclose(fin);

  // check that the number of linear and nonlinear modes are meaningful
  for(int i=0; i<numModels; i++)
  {
    if ((numLinearModes[i] <= 0) || (numLinearModes[i] > 16384))
    {
      wxString errM = _T("Incorrect number of linear modes for model #");
      char numStr[128] = "";
      sprintf(numStr,"%i .",i);
      errM += wxString(numStr, wxConvUTF8);
      this->errMsg(errM, errM);
      PreprocessManySimulationsDeallocateHelper(numModels, meshFiles, bouFiles, numLinearModes, numNonLinearModes);
      return;
    }

    if ((numNonLinearModes[i] <= 0) || (numNonLinearModes[i] > 16384))
    {
      wxString errM = _T("Incorrect number of nonlinear modes for model #");
      char numStr[128] = "";
      sprintf(numStr,"%i .",i);
      errM += wxString(numStr, wxConvUTF8);
      this->errMsg(errM, errM);
      PreprocessManySimulationsDeallocateHelper(numModels, meshFiles, bouFiles, numLinearModes, numNonLinearModes);
      return;
    }
  }

  // do the pre-process
  for(int i=0; i<numModels; i++)
  {
    printf("\n\n");
    printf("*****************************************\n");
    printf("**** Pre-processing model #%d/%d: %s %s numLin=%d numNonLin=%d...\n", i, numModels, meshFiles[i], bouFiles[i], numLinearModes[i], numNonLinearModes[i]);
    printf("*****************************************\n\n");

    wxString meshFilewx = wxString(meshFiles[i], wxConvUTF8);
    wxString localProjectName = meshFilewx.BeforeLast('.');
    wxString projectName = wxString(directoryName,  wxConvUTF8) + _T("/") + localProjectName;

    // load the simulation mesh
    wxString meshFilenameComplete = wxString(directoryName,  wxConvUTF8) + _T("/") + meshFilewx;
    int meshCode = LoadSimulationMesh(meshFilenameComplete);
    if (meshCode != 0)
    {
      char s[96];
      sprintf(s, "Error: preprocess %d failed, could not load mesh %s, exit code %d.\n", i, (const char*)meshFilenameComplete.mb_str(), meshCode);
      printf("%s\n", s);
      wxString errM(s, wxConvUTF8);
      this->errMsg(errM, errM);
      break;
    }

    // load the bou file
    wxString bouFilewx = wxString(bouFiles[i], wxConvUTF8);
    wxString bouFilenameComplete = wxString(directoryName,  wxConvUTF8) + _T("/") + bouFilewx;
    int bouCode = LoadFixedVertices(bouFilenameComplete);
    if (bouCode != 0)
    {
      char s[96];
      sprintf(s, "Error: preprocess %d failed, could not load fixed vertices %s, exit code %d.\n", i, (const char*)bouFilenameComplete.mb_str(), bouCode);
      printf("%s\n", s);
      wxString errM(s, wxConvUTF8);
      this->errMsg(errM, errM);
      break;
    }

    int code = PreprocessSingleSimulation(projectName, numLinearModes[i], numNonLinearModes[i], numComputationThreads_value);
    if (code != 0)
    {
      char s[96];
      sprintf(s, "Error: preprocess %d failed, exit code %d.\n", i, code);
      printf("%s\n", s);
      wxString errM(s, wxConvUTF8);
      this->errMsg(errM, errM);
      break;
    }
  }

  PreprocessManySimulationsDeallocateHelper(numModels, meshFiles, bouFiles, numLinearModes, numNonLinearModes);

  printf("\nPreprocessing completed (%d models).\n", numModels);
}

void MyFrame::OnPrepareRuntimeSimulation(wxCommandEvent& event)
{
  int createdRenderingMeshFromSimulationMesh = 0;
  if (!precomputationState.renderingMeshAvailable)
  {
    wxMessageDialog * dlg = new wxMessageDialog(this, 
      _T("Click OK to use the surface mesh of the simulation mesh as the rendering mesh.\n\n")
      _T("Click CANCEL to load your own rendering mesh (via the \"Mesh.Load Triangle Mesh\" menu option)."),
      _T("Rendering mesh has not been specified"),
      wxOK | wxCANCEL);

    if (dlg->ShowModal() != wxID_OK)
    {
      delete(dlg);
      return;
    }

    delete(dlg);

    // create rendering mesh from the simulation mesh
    CreateRenderingMeshFromSimulationMesh();
    createdRenderingMeshFromSimulationMesh = 1;
  }

  // get the project name, and the scale to 1 Hz flag
  wxDialog * dlg = new wxDialog(this, -1, _T("Prepare real-time simulation"),
    wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE, _T("dialogBox") );
  
  wxBoxSizer * dlgSizer = new wxBoxSizer(wxVERTICAL);

  wxStaticText * projectNameText = new wxStaticText(dlg, -1, 
       _T("Project name: "), wxDefaultPosition, wxDefaultSize, 
       wxALIGN_CENTER, _T( "staticText"));

  wxTextCtrl * projectNameControl = new wxTextCtrl(dlg, -1, uiState.projectName, wxDefaultPosition, wxSize(200, -1));

  wxBoxSizer * projectNameSizer = new wxBoxSizer(wxHORIZONTAL);
  projectNameSizer->Add(projectNameText, 0, wxCENTER);
  projectNameSizer->Add(projectNameControl, 0, wxCENTER);
  dlgSizer->Add(projectNameSizer, 0, wxALL | wxCENTER, 8);

  wxCheckBox * scaleTo1HzCheckBox = NULL;
  if (precomputationState.linearModesAvailable)
  {
    scaleTo1HzCheckBox = new wxCheckBox(dlg, 
      -1, _T("Scale frequency spectrum to 1 Hz"));
    scaleTo1HzCheckBox->SetValue(uiState.scaleRealTimeTo1HzCheckBox);
    dlgSizer->Add(scaleTo1HzCheckBox, 0, wxLEFT | wxRIGHT | wxBOTTOM | wxCENTER, 8);
  }

  dlgSizer->Add(dlg->CreateButtonSizer(wxOK | wxCANCEL), 0, wxLEFT | wxRIGHT | wxBOTTOM | wxCENTER, 8);

  dlg->SetSizer(dlgSizer);
  dlgSizer->SetSizeHints(dlg);

  if (dlg->ShowModal() != wxID_OK)
  {
    if (createdRenderingMeshFromSimulationMesh)
      DeleteRenderingMesh();
    delete(dlg);
    return;
  }

  uiState.projectName = projectNameControl->GetValue();
  if ((precomputationState.linearModesAvailable) && (precomputationState.frequenciesAvailable))
    uiState.scaleRealTimeTo1HzCheckBox = scaleTo1HzCheckBox->GetValue();
  else
    uiState.scaleRealTimeTo1HzCheckBox = false; 
  delete(dlg);

  // create subdirectory
  const char * projectNameC = (const char*)uiState.projectName.mb_str();
  char s[4096];

  printf("\nPreparing a real-time simulation:\n");
  printf("Creating subdirectory: realtime/%s\n", projectNameC);

  // first, create the top level "realtime" directory
  sprintf(s,"realtime");
  if (!wxDirExists(s))
    wxMkdir(_T("realtime"));

  // create the project subdirectory
  sprintf(s,"realtime/%s",projectNameC);
  if (!wxDirExists(s))
    wxMkdir(_T("realtime/") + uiState.projectName);

  // copy rendering mesh file, with mtl
  printf("Writing rendering mesh and rendering materials file.\n");
  sprintf(s,"realtime/%s/%s.obj", projectNameC, projectNameC);
  precomputationState.renderingMesh->save(string(s), 1);
  
  // generate .URendering.float
  if (!precomputationState.interpolationDataAvailable)
    BuildInterpolant();

  printf("Interpolating and saving URendering.float matrix.\n");
  double * inputMatrix = precomputationState.nonLinearModalMatrix->GetMatrix();
  int nTarget = (int)(precomputationState.renderingMesh->getNumVertices());
  int dataSize = 3 * nTarget * precomputationState.nonLinearModalMatrix->Getr();
  double * outputMatrix = (double*) malloc (sizeof(double) * dataSize);
  for(int i=0; i<precomputationState.nonLinearModalMatrix->Getr(); i++)
  {
    precomputationState.simulationMesh->interpolate(
         &inputMatrix[ELT(3*precomputationState.simulationMesh->getNumVertices(),0,i)],
         &outputMatrix[ELT(3*nTarget,0,i)],
         nTarget, precomputationState.simulationMesh->getNumElementVertices(),
         precomputationState.interpolationData_vertices,
         precomputationState.interpolationData_weights);
  }

  float * outputMatrixFloat = (float*) outputMatrix;

  for(int i=0; i< dataSize; i++)
    outputMatrixFloat[i] = (float)(outputMatrix[i]);
  
  // save file to disk
  sprintf(s,"realtime/%s/%s.URendering.float", projectNameC, projectNameC);
  int code = WriteMatrixToDisk(s,
       3 * nTarget, 
       precomputationState.nonLinearModalMatrix->Getr(), 
       outputMatrixFloat);

  if (code != 0)
  {
    printf("Error: failed to write to file: realtime/%s/%s.URendering.float .\n", projectNameC, projectNameC);
  }

  free(outputMatrix); 

  // copy .cub
  printf("Saving cub file.\n");
  sprintf(s,"realtime/%s/%s.cub", projectNameC, projectNameC);
  precomputationState.cubicPolynomials->Save(s);

  // create .lighting
  printf("Creating lighting file.\n");
  sprintf(s,"realtime/%s/%s.lighting", projectNameC, projectNameC);
  FILE * fout;
  OpenFile_(s, &fout, "w");
  fprintf(fout, "%s", lightingString);
  fclose(fout);

  // create .config
  printf("Creating config file.\n");
  sprintf(s,"realtime/%s/%s.config", projectNameC, projectNameC);
  OpenFile_(s, &fout, "w");

  fprintf(fout, "*deformableObjectFilename\n");
  fprintf(fout, "realtime/%s/%s.obj\n\n", projectNameC, projectNameC);

  fprintf(fout, "*modesFilename\n");
  fprintf(fout, "realtime/%s/%s.URendering.float\n\n", projectNameC, projectNameC);

  fprintf(fout, "*cubicPolynomialFilename\n");
  fprintf(fout, "realtime/%s/%s.cub\n\n", projectNameC, projectNameC);

  // set compliance automatically
  SparseMatrix * massMatrix;
  GenerateMassMatrix::computeMassMatrix(precomputationState.simulationMesh, &massMatrix, true);
  double totalMass = massMatrix->SumEntries();
  // compute stiffness matrix
  int r = (precomputationState.nonLinearModalMatrix)->Getr();
  int n3 = 3 * (precomputationState.nonLinearModalMatrix)->Getn();
  double * K = (double*) malloc (sizeof(double) * r * r);
  double * zero = (double*) calloc (r, sizeof(double));

  StVKReducedStiffnessMatrix stVKReducedStiffnessMatrix(precomputationState.cubicPolynomials);
  stVKReducedStiffnessMatrix.Evaluate(zero, K);
  if (uiState.scaleRealTimeTo1HzCheckBox)
  {
    double factor = (precomputationState.frequencies)[precomputationState.numRigidModes];
    factor = 1.0 / (factor * factor);
    for(int i=0; i<r*r; i++)
      K[i] *= factor;
  }
  Matrix<double> KM(r, r, K, false, false);
  Matrix<double> KInverseM = Inverse(KM);
  double * KInvUT = (double*) malloc (sizeof(double) * n3 * r);
  (precomputationState.nonLinearModalMatrix)->AssembleMatrix(r, KInverseM.GetData(), KInvUT);
  InPlaceTransposeMatrix(n3, r, KInvUT);
  double gamma2 = 0;
  // find column of KInvUT with maximum 2-norm
  for(int i=0; i<n3; i++) // over all columns
  {
    double norm2 = 0.0;
    for(int j=0; j<r; j++)
      norm2 += KInvUT[ELT(r,j,i)] * KInvUT[ELT(r,j,i)];
    if (norm2 > gamma2)
      gamma2 = norm2;
  }

  double gamma = sqrt(gamma2);
  double radius = precomputationState.simulationMeshGeometricParameters.radius;
  double beta = 0.25;
  double numPixels = 100.0;
  double compliance = sqrt(totalMass) * beta * radius / (gamma * numPixels);

  fprintf(fout, "*deformableObjectCompliance\n");
  fprintf(fout, "%G\n\n", compliance);

  free(KInvUT);
  free(zero);
  free(K);
  delete(massMatrix);

  fprintf(fout, "*frequencyScaling\n");
  if (uiState.scaleRealTimeTo1HzCheckBox)
    fprintf(fout, "%G\n\n", 1.0 / (precomputationState.frequencies)[precomputationState.numRigidModes]);
  else
    fprintf(fout, "1.0\n\n");

  fprintf(fout, "*dampingMassCoef\n");
  fprintf(fout, "0.0\n\n");

  fprintf(fout, "*dampingStiffnessCoef\n");
  fprintf(fout, "0.003\n\n");

  fprintf(fout, "*substepsPerTimeStep\n");
  fprintf(fout, "5\n\n");

  fprintf(fout, "*renderWireframe\n");
  fprintf(fout, "1\n\n");

  fprintf(fout, "*cameraRadius\n");
  fprintf(fout, "%f\n\n", myGLCanvas->GetCamera()->GetRadius());

  fprintf(fout, "*cameraLattitude\n");
  fprintf(fout, "%f\n\n", myGLCanvas->GetCamera()->GetTheta() * 180 / M_PI);

  fprintf(fout, "*cameraLongitude\n");
  fprintf(fout, "%f\n\n", myGLCanvas->GetCamera()->GetPhi() * 180 / M_PI);

  double focusPosition[3];
  myGLCanvas->GetCamera()->GetFocusPosition(focusPosition);

  fprintf(fout, "*focusPositionX\n");
  fprintf(fout, "%f\n\n", focusPosition[0]);

  fprintf(fout, "*focusPositionY\n");
  fprintf(fout, "%f\n\n", focusPosition[1]);

  fprintf(fout, "*focusPositionZ\n");
  fprintf(fout, "%f\n\n", focusPosition[2]);

  fprintf(fout, "*backgroundColor\n");
  fprintf(fout, "220 220 220\n\n");

  fprintf(fout, "*lightingConfigFilename\n");
  fprintf(fout, "realtime/%s/%s.lighting\n\n", projectNameC, projectNameC);

  fprintf(fout, "*renderOnGPU\n");
  fprintf(fout, "1\n\n");

  fprintf(fout, "*windowWidth\n");
  fprintf(fout, "800\n\n");

  fprintf(fout, "*windowHeight\n");
  fprintf(fout, "800\n\n");

  fclose(fout);

  // create .bat file
  sprintf(s,"%s.bat", projectNameC);
  printf("Creating batch file %s.\n", s);
  OpenFile_(s, &fout, "w");

  fprintf(fout, "../reducedDynamicSolver-rt/reducedDynamicSolver-rt realtime/%s/%s.config", projectNameC, projectNameC);
  fclose(fout);

  #ifdef __WXMSW__
  #else
    sprintf(s,"chmod u+x %s.bat", projectNameC);
    int systemCode = system(s);
    if (systemCode != 0)
      printf("Error: exit code from system call: %d\n", systemCode);
  #endif

  precomputationState.runtimeSimReady = true;

  if (createdRenderingMeshFromSimulationMesh)
    DeleteRenderingMesh();

  UpdateMenus();

  Refresh();
}

void MyFrame::OnLaunchRuntimeSimulation(wxCommandEvent& event)
{
  // launch external runtime simulation
  const char * projectNameC = (const char*)uiState.projectName.mb_str();
  char s[4096];
  #ifdef __WXMSW__
    sprintf(s,"%s.bat", projectNameC);
  #else
    sprintf(s,"./%s.bat", projectNameC);
  #endif
  int systemCode = system(s);
  if (systemCode != 0)
    printf("Error: exit code from system call: %d\n", systemCode);
}

void MyFrame::OnTuneRuntimeSimulation(wxCommandEvent& event)
{
  wxString message = 
	  _T("You can tune the real-time simulation from within the real-time GUI (activated by choosing \"Launch real-time simulation\").\n\n")
    _T("There are essentially two parameters to tune:\n")
    _T("  1. You can set how stiff the object feels by adjusting the \"strength\" of your mouse forces via the \"Deformable object compliance\" parameter.\n")
    _T("  2. You can make the object oscillate faster/slower by altering the \"Base frequency\" parameter.\n");
        
  wxMessageBox(message,
    _T("Tuning the real-time simulation"), wxOK | wxICON_INFORMATION, this);
}

